Does the Alcatel and ZTE Firefox OS phones come with a network lock ?

I plan to buy one of the two new phones from Spain / Poland running Firefox OS and I'm curios to know if they come with a network lock that will prevent me to use it from Romania, or will they come unlocked?

Thank you!

I plan to buy one of the two new phones from Spain / Poland running Firefox OS and I'm curios to know if they come with a network lock that will prevent me to use it from Romania, or will they come unlocked?
Thank you!

Chosen solution

I am proposing to buy ZTE OPEN fire fox phone China. Is it possible to use it in Uganda? Do I need to unlock it or the carrier cannot support it?